Wrench



Patented Mar. 27, 1923.

PATENT OFFICE.

FOREST HOOPER, 0F EDMONTON, ALBERTA, CANADA.

WRENCH.

Application filed January 25, 1921.

To all whom it may concern:

Be it known that I, FOREST HooPER, a citizen of the United States, residing in Edmonton, Alberta, Canada, have invented an Improvement in Wrenches, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to wrenches and has for its object to provide a wrench which can be used as a pipe wrench without danger of crushing the pipe, and also as a monkey wrench which can be used on finished valves, nuts and the like without marring the nickel or other finish.

The invention also has for its object to provide a wrench of the character described, which can be quickly and positively adjusted to any size pipe or fitting within limits.

Provision is made for closing the jaws of the wrench after they have been adjusted to the pipe and to increase the grip of the jaws as they are closed, and further to prevent the jaws from looking on the pipe when the pressure or tension is removed.

These and other features of this inventionwill be pointed out in the claims at the end of this specification.

Fig. 1 is a side elevation of a wrench embodying this invention, showing the'same in its open position.

v Fig. 2, a like elevation showing the wrench in its closed position on a pipe.

Fig.3, a longitudinal section of the wrench shown in Fig. 1.

Fig. 4, a section on the irregular line 44, Fig. '2, and

Fig. 5, a section on the line 5-5, Fig. 2.

Referring to the drawings a, 6, represent the two jaws of the wrench and o, d, the shanks thereof.

The jaws a, b, may be designated the upper and lower jaws, and are provided with substantially flat or straight opposing faces 10, 12, which enable the wrench to be used as a monkey wrench, and said faces are provided between their ends with ooncavities or recesses l3, 14, which form with the flat faces 10, 12, two relatively sharp corner teeth 15, 16, on each jaw, and the said recesses may also be provided between said corner teeth with additional teeth as shown. The

corner teeth 15, 16 afii'ord two separate bear Serial No. 439,892.

crushing the pipe, when pressure is applied to turn the same. The corner teeth 15, 16 are flush with the faces 10, 12 of the jaws and therefore do not interfere with the use of the wrench as a monkey wrench, and do not mar the nickel or other finish on valves, nuts and the like when the wrench is used thereon. j a

The jawsa, b, in the present instance are both movable, and provision is made for quickly obtaining a coarse adjustment of the jaws and also for a finer adjustment of the same. To this end, the shank c of the aw a is inserted into a socket or guideway 21 in a handle 22, and is provided on one face with teeth 23 suitably shaped to be engaged by screw or helically arranged external teeth 24 on a rotatable nut or adjusting member 25 which is mounted to turn on a pivot pin 26 between brackets 27, 28, at-v tached to the handle 22. The pivot pin 26 is extended freely through the bracket Y27 and nut 25 and is in threaded engagement with the bracket 28. The screw teeth 24 of the ad usting nut 25 project into the socket or shank 0 and permits the latter to beslid freely in the guideway or socket 21, thereby enabling the jaws a, b, to be quickly engaged with the pipe 20 or other object to which the wrench is applied.

This engagement of the jaws a, Z), is effected by what may be considered a coarse adjustment of the jaws, and when thus adjusted, a finer adjustment of the outer jaw a may be obtained by turning the nut 25 so as to first engage the teeth 24 on the nut with the teeth 23 on the shank 0, and then on further turning the nut the jaw a is moved toward the jaw b by the screw teeth 24 on the nut, which latter may be provided with a wing or handle 35 to facilitate turning the same.

Provision is also made for adjusting the jaw b with relation tothe jaw a, and to in- Ill) ' I to the pipe 20 or other article,.the adjusting strap or guiding member 36 through which the shank'o of the upper jaw a is extended and which serves to guide the lower jaw in its movement andtQ Oonnect it in operative;

relation with the upper jaw. The movement of the lower jaw Z) on the shank 0 of the upper jaw is effected by an elbow lever pivotally mounted on the handle 22-and pivotally connected with lower jaw 12. The elbow leveriis preferably made as herein shown and handle 22. The elbow shaped members. 40

turn on trunnions or circular projections a2 on the handle 22, see Fig. 4E, and are reta'ined'o'n 'the'hand'le 22 by screws 43. The

short arms of the elbow shaped members r-O arepivotallyeonnected with the lower jaw b by the 'pivot pin or screw 44:.

The back member 41 cooperates with the handle 22 and the latter actsas a stop to limit the-movement of the jaw moving lever 40 and prevents the leverbeing moved beyond the center on which it turns and thereby prevents the jaws a, b becoming locked on the when the pressure on the leveriszremoved;

In: the normal" or open position of the wrench, the lever 40 is turned so that its lon ar'meirtends away from thehandle 22' ass own in Fig. 1, and the bottom ot'the jaw b. bears against the bracket 1281,

WVhen' it" is desired to apply the wrench nut is turned'sothat its flat or untoothed portion 30' opposes the teeth28 on the shank c, and when thus positioned the shank a can be slid in the guideway 21 so as-to bring" the jaw a' substantially into engagement with the work, with'which, the lowerjawh is loosely engaged. The nut 25 is then turnedto engage its teeth 24 with the teeth 23"of the shank c to effect the final adjust ment ofthe upper jaw a., When the parts are thus positioned'on thepipe 20 or' o'ther work, the-operator grasps-the handle 22 and,

lever 40 and exerts pressure on the. latter thereby moving the lower jaw vb into .firm engagement with the pipe 20, and when thus-engaged the pressure of the lower jaw can be gradually increased by pressure applied to thelever 40 which may be efi'ected asthe handle of the wrench is ulled or pressedupon to' turn the pipe. y relieving the pressure from the jaw moving lever a0, the jaws are automatically released from the pipe and the wrench can be turned backward to get a new grip when desired or required.

Agnoted above, the wrench is equally applic'a'ble for use as a monkey'wrench, with out danger of marring the finish on the work. 7 One embodiment of the invention is herein shown, but it is not desired tolimit the invention to the particular construction shown.

Claims- 1. In a wrench, in combination, a jaw provided with a substantially smooth gripping face having'a recess therein to form corner teeth, a shank attached 'tosaid jaw and provided with teeth, a handle having a guideway in which said shank is inserted, a rotatable member provided with external. screw tcetlrfor engagement with the teeth on said shank, and provided with an un toothed portion to permit disengagement of said shank from said rotatable member, a cooperating jaw provided with a substantiallysmooth' gripping face 'havinga. recess therein to form corner teeth, an elbow lever having its long arm pivoted tofsaidhandle and its short arm pivotally connected with said cooperating'jaw to move the same,and[

shank 6' the first-mentionedjaw is extended 1 and movable, and a lever pivoted to said handle and" connected with said secondjaw to 'eiiect movement ofthe-latter on hemove able shank ofthe first-mentioned jaw. In a wrench; in combination a handle, a jaw provided with a shank guided and movable lengthwise of said handle andprovidedx'vith screw teeth, a rotatable 'me'Iri-ber having external screw teeth for engagement with the teeth on said shank andprovidedi with an untoothed portion toefi'ect; disengagement'of'the said rotatable memberifiom. said shank a second jaw movable' to'war'd the first mentioned jaw, and a lever pivoted to said handle for moving saidse'c'ondja'w,

4'. In a wrench, in combination, a,har idlfe-, a jaw provided with a, shank having teeth" and movable lengthwise of said handle, a second jaw inslidin'g'engagement with said shank and bodily movable toward the first mentioned jaw, a nut rotatably mounted on said handle and-having a mutilated external threadfor engagement with and disengagement from the teeth on said shank to "permit the jaw to be moved with relation to said handle for coarse adjustmentfindependently of the nut and to permit the jaw to be moved for fine adjustment by a partial rotation of said nut, and-means for moving the second jaw toward the first mentioned jaw with an increasing pressure.

5. In a wrench, in combination, a handle provided with a guideway, a jaw having a shank slidable in said guideway and provided with screw teeth, and a rotatable memher having external screw teeth for engagement with the teeth on said shank and provided with an untoothed portion to effect disengagement of the said rotatable member from said shank, a second jaw movable toward the first mentioned jaw, and a lever pivoted to said handle and pivotally connected with said second jaw to move the latter.

6. In a wrench, in combination, a handle, a jaw provided with a shank guided by and movable lengthwise of said handle, a nut carried by said handle and cooperatin with said shank to effect movement thereof engthwise of said handle, a second jaw mounted to move on said shank, and an elbow lever having its long arm pivoted to said handle and its short arm pivotally connected with said second mentioned jaw to efl'ect movement of the latter by movement of the lever under all conditions.

7. In a wrench, in combination, a handle, a jaw provided with a shank guided by and movable lengthwise of said handle, a nut carried by said handle and co-operating with said shank to effect movement thereof lengthwise of said handle, a second jaw mounted to move on said shank, and an elbow lever having its long arm pivoted to said handle and its short arm pivotally connected with said second mentioned jaw to efi'ect movementof the latter by movement of the lever under all conditions, and means on said lever cooperating with said handle to limit the movement of said lever toward said handle.

In testimony whereof, I have signed my name to this specification.

FOREST HOOPER. 

